What is 24-hour pH/Impendence probe monitoring?
24-hour pH/Impedance probe monitoring is another diagnostic method designed to objectively test for the presence of laryngopharyngeal reflux (LPR). This method is slightly more complex and invasive, however it is the current gold standard diagnostic test. The 24-hour test, consists of a fine flexible probe attached to a small device which registers changes in pH and fluid movement in your pharynx and oeosphagus.
The 24-hour probe is a very small cylindrical tube that will be placed through your nose into your stomach. A local anaesthetic nasal spray will be administered to ensure your comfort, however there may be some discomfort when the probe is placed. To ensure the probe is in the correct location, a flexible nasendoscopy (a small tube with a camera attached) will be performed (the tube will be similarly advanced into upper throat via the nose) to visualise the 24-hour probe and confirm its correct placement. The flexible nasendoscope will be removed however the probe will remain in place for 24 hours. Your doctor will ask you to nominate 3 key symptoms that you experience with relation to LPR.
Your doctor will ask you to nominate 3 key symptoms that you experience with relation to LPR.
When the 24-hour probe is in place, you must adhere to your normal routine. You will be required to indicate on the device whether you are:
- Standing up or lying down
- Mealtimes (commencement of meal time and cessation of meal time)
- When you experience your 3 key symptoms.
You will be provided with an information sheet which clearly details how to operate the device – should you have any further questions please ask your laryngologist.